I have read that jaegers were loaded without patches. The bullet was pounded down the bore with a mallet. I don't think they used very heavy charges in them. Most of their hunting was close range.
Many years ago, the Swiss were attributed with hammering naked lead balls down their 'match' barrels. The old article I read this in, talked about the exaggerated hep-resting positions of their shooting - was it in a book by Ned Roberts? Anyway - if it was Ned Robert's book on Schutzen shooting, he would know if they used patches or not, I'd expect.